Quantum Gravity, Hydrodynamics and Emergent Cosmology: A Collection of Perspectives

Abstract

This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emergent cosmology. It explores four key research areas: (a) the interplay between hydrodynamics and cosmology, including analog gravity systems; (b) phase transitions, continuum limits and emergent geometry in quantum gravity; (c) relational perspectives in gravity and quantum gravity; and (d) the emergence of cosmological models rooted in quantum gravity frameworks. Each contribution presents the distinct perspectives of its respective authors. Additionally, the introduction by the editors proposes an integrative view, suggesting how these thematic units could serve as foundational pillars for a novel theoretical cosmology framework termed "hydrodynamics on superspace".

42 + 23 pages

References in corpus (50)

• Reference frames, superselection rules, and quantum information
• Quantum Nature of the Big Bang
• Spectral Dimension of the Universe in Quantum Gravity at a Lifshitz Point
• Toward an AdS/cold atoms correspondence: a geometric realization of the Schroedinger symmetry
• Fiber-optical analogue of the event horizon
• Measurement of stimulated Hawking emission in an analogue system
• The resource theory of quantum reference frames: manipulations and monotones
• Observation of self-amplifying Hawking radiation in an analog black hole laser
• Nonperturbative Quantum Gravity
• Numerical observation of Hawking radiation from acoustic black holes in atomic Bose-Einstein condensates
• Gibbons-Hawking Effect in the Sonic de Sitter Space-Time of an Expanding Bose-Einstein-Condensed Gas
• Group field theory with non-commutative metric variables
• Quantum simulation of cosmic inflation in two-component Bose-Einstein condensates
• "Cosmological" quasiparticle production in harmonically trapped superfluid gases
• Gravity quantized
• Analogue model of a FRW universe in Bose-Einstein condensates: Application of the classical field method
• Functional Renormalisation Group Approach for Tensorial Group Field Theory: a Rank-3 Model
• Second- and First-Order Phase Transitions in CDT
• Revisiting observables in generally covariant theories in the light of gauge fixing methods
• Invitation to Random Tensors
• Singularity resolution depends on the clock
• Cosmological particle production in emergent rainbow spacetimes
• The next generation of analogue gravity experiments
• Critical behavior in spherical and hyperbolic spaces
• Dynamics of a Quantum Reference Frame
• Metric fluctuations of an evaporating black hole from back reaction of stress tensor fluctuations
• Effective Dynamics from Coherent State Path Integral of Full Loop Quantum Gravity
• Analogue Cosmological Particle Creation: Quantum Correlations in Expanding Bose Einstein Condensates
• Towards phase transitions between discrete and continuum quantum spacetime from the Renormalization Group
• Cosmological Constant from the Emergent Gravity Perspective
• Group field theory condensate cosmology: An appetizer
• On the Onset of Inflation in Loop Quantum Cosmology
• Composite Operators in Asymptotic Safety
• Impact of nonlinear effective interactions on GFT quantum gravity condensates
• Assessing degrees of entanglement of phonon states in atomic Bose gases through the measurement of commuting observables
• Group Field Theory in dimension four minus epsilon
• Relational evolution of effectively interacting GFT quantum gravity condensates
• Physical implications of a fundamental period of time
• Relational observables in Asymptotically safe gravity
• Emergent Cosmology from Quantum Gravity in the Lorentzian Barrett-Crane Tensorial Group Field Theory Model
• Quasiparticle universes in Bose-Einstein condensates
• Dynamics of anisotropies close to a cosmological bounce in quantum gravity
• Non-linear (loop) quantum cosmology
• Coordinates, observables and symmetry in relativity
• Summing bulk quantum numbers with Monte Carlo in spin foam theories
• The Cosmological Spinor
• On consistent gauge fixing conditions in polymerized gravitational systems
• Spinfoams: Foundations
• Space-time dimensionality from brane collisions
• Tachyonic decay of unstable Dirichlet branes